In Tok, Alaska, you put cardboard or leather across your car grill: "Otherwise, when you are driving, the cold outside air is forced into the car, quickly cooling it down until you literally have no heat."
Also: "The outer walls on our house are 12 inches thick. My husband says this is not typical. Usually, walls are 6 inches thick, I believe. But the foot of wall between us and the cold is why we can stay so warm in the house."
Heading to the general store:
A lil' reality check for us chilled out Brits :]